1 ;;; mml1991.el --- Old PGP message format (RFC 1991) support for MML
3 ;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
6 ;; Author: Sascha Ldecke <sascha@meta-x.de>,
7 ;; Simon Josefsson <simon@josefsson.org> (Mailcrypt interface, Gnus glue)
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 3, or (at your option)
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
25 ;; Boston, MA 02110-1301, USA.
33 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
41 (defvar mc-pgp-always-sign)
43 (autoload 'quoted-printable-decode-region "qp")
44 (autoload 'quoted-printable-encode-region "qp")
46 (autoload 'mm-decode-content-transfer-encoding "mm-bodies")
47 (autoload 'mm-encode-content-transfer-encoding "mm-bodies")
48 (autoload 'message-options-get "message")
49 (autoload 'message-options-set "message")
51 (defvar mml1991-use mml2015-use
52 "The package used for PGP.")
54 (defvar mml1991-function-alist
55 '((mailcrypt mml1991-mailcrypt-sign
56 mml1991-mailcrypt-encrypt)
63 "Alist of PGP functions.")
65 (defvar mml1991-verbose mml-secure-verbose
66 "If non-nil, ask the user about the current operation more verbosely.")
68 (defvar mml1991-cache-passphrase mml-secure-cache-passphrase
69 "If t, cache passphrase.")
71 (defvar mml1991-passphrase-cache-expiry mml-secure-passphrase-cache-expiry
72 "How many seconds the passphrase is cached.
73 Whether the passphrase is cached at all is controlled by
74 `mml1991-cache-passphrase'.")
76 (defvar mml1991-signers nil
77 "A list of your own key ID which will be used to sign a message.")
79 (defvar mml1991-encrypt-to-self nil
80 "If t, add your own key ID to recipient list when encryption.")
85 (autoload 'mc-sign-generic "mc-toplev"))
87 (defvar mml1991-decrypt-function 'mailcrypt-decrypt)
88 (defvar mml1991-verify-function 'mailcrypt-verify)
90 (defun mml1991-mailcrypt-sign (cont)
91 (let ((text (current-buffer))
93 (result-buffer (get-buffer-create "*GPG Result*")))
94 ;; Save MIME Content[^ ]+: headers from signing
95 (goto-char (point-min))
96 (while (looking-at "^Content[^ ]+:") (forward-line))
98 (setq headers (buffer-string))
99 (delete-region (point-min) (point)))
100 (goto-char (point-max))
103 (quoted-printable-decode-region (point-min) (point-max))
105 (setq signature (current-buffer))
106 (insert-buffer-substring text)
107 (unless (mc-sign-generic (message-options-get 'message-sender)
109 (unless (> (point-max) (point-min))
110 (pop-to-buffer result-buffer)
111 (error "Sign error")))
112 (goto-char (point-min))
113 (while (re-search-forward "\r+$" nil t)
114 (replace-match "" t t))
115 (quoted-printable-encode-region (point-min) (point-max))
117 (delete-region (point-min) (point-max))
118 (if headers (insert headers))
120 (insert-buffer-substring signature)
121 (goto-char (point-max)))))
123 (declare-function mc-encrypt-generic "ext:mc-toplev"
124 (&optional recipients scheme start end from sign))
126 (defun mml1991-mailcrypt-encrypt (cont &optional sign)
127 (let ((text (current-buffer))
129 (or mc-pgp-always-sign
131 (eq t (or (message-options-get 'message-sign-encrypt)
133 'message-sign-encrypt
134 (or (y-or-n-p "Sign the message? ")
138 (result-buffer (get-buffer-create "*GPG Result*")))
139 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
140 (goto-char (point-min))
141 (while (looking-at "^Content[^ ]+:") (forward-line))
143 (delete-region (point-min) (point)))
144 (mm-with-unibyte-current-buffer
146 (setq cipher (current-buffer))
147 (insert-buffer-substring text)
148 (unless (mc-encrypt-generic
150 (message-options-get 'message-recipients)
151 (message-options-set 'message-recipients
152 (read-string "Recipients: ")))
154 (point-min) (point-max)
155 (message-options-get 'message-sender)
157 (unless (> (point-max) (point-min))
158 (pop-to-buffer result-buffer)
159 (error "Encrypt error")))
160 (goto-char (point-min))
161 (while (re-search-forward "\r+$" nil t)
162 (replace-match "" t t))
164 (delete-region (point-min) (point-max))
165 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
166 ;;(insert "Version: 1\n\n")
168 (insert-buffer-substring cipher)
169 (goto-char (point-max))))))
174 (autoload 'gpg-sign-cleartext "gpg"))
176 (declare-function gpg-sign-encrypt "ext:gpg"
177 (plaintext ciphertext result recipients &optional
178 passphrase sign-with-key armor textmode))
179 (declare-function gpg-encrypt "ext:gpg"
180 (plaintext ciphertext result recipients &optional
181 passphrase armor textmode))
183 (defun mml1991-gpg-sign (cont)
184 (let ((text (current-buffer))
186 (result-buffer (get-buffer-create "*GPG Result*")))
187 ;; Save MIME Content[^ ]+: headers from signing
188 (goto-char (point-min))
189 (while (looking-at "^Content[^ ]+:") (forward-line))
191 (setq headers (buffer-string))
192 (delete-region (point-min) (point)))
193 (goto-char (point-max))
196 (quoted-printable-decode-region (point-min) (point-max))
198 (unless (gpg-sign-cleartext text (setq signature (current-buffer))
201 (message-options-get 'message-sender))
202 (unless (> (point-max) (point-min))
203 (pop-to-buffer result-buffer)
204 (error "Sign error")))
205 (goto-char (point-min))
206 (while (re-search-forward "\r+$" nil t)
207 (replace-match "" t t))
208 (quoted-printable-encode-region (point-min) (point-max))
210 (delete-region (point-min) (point-max))
211 (if headers (insert headers))
213 (insert-buffer-substring signature)
214 (goto-char (point-max)))))
216 (defun mml1991-gpg-encrypt (cont &optional sign)
217 (let ((text (current-buffer))
219 (result-buffer (get-buffer-create "*GPG Result*")))
220 ;; Strip MIME Content[^ ]: headers since it will be ASCII ARMOURED
221 (goto-char (point-min))
222 (while (looking-at "^Content[^ ]+:") (forward-line))
224 (delete-region (point-min) (point)))
225 (mm-with-unibyte-current-buffer
227 (flet ((gpg-encrypt-func
228 (sign plaintext ciphertext result recipients &optional
229 passphrase sign-with-key armor textmode)
232 plaintext ciphertext result recipients passphrase
233 sign-with-key armor textmode)
235 plaintext ciphertext result recipients passphrase
237 (unless (gpg-encrypt-func
239 text (setq cipher (current-buffer))
243 (message-options-get 'message-recipients)
244 (message-options-set 'message-recipients
245 (read-string "Recipients: ")))
248 (message-options-get 'message-sender)
249 t t) ; armor & textmode
250 (unless (> (point-max) (point-min))
251 (pop-to-buffer result-buffer)
252 (error "Encrypt error"))))
253 (goto-char (point-min))
254 (while (re-search-forward "\r+$" nil t)
255 (replace-match "" t t))
257 (delete-region (point-min) (point-max))
258 ;;(insert "Content-Type: application/pgp-encrypted\n\n")
259 ;;(insert "Version: 1\n\n")
261 (insert-buffer-substring cipher)
262 (goto-char (point-max))))))
266 (defvar pgg-default-user-id)
267 (defvar pgg-errors-buffer)
268 (defvar pgg-output-buffer)
270 (defun mml1991-pgg-sign (cont)
271 (let ((pgg-text-mode t)
272 (pgg-default-user-id (or (message-options-get 'mml-sender)
273 pgg-default-user-id))
275 ;; Don't sign headers.
276 (goto-char (point-min))
277 (when (re-search-forward "^$" nil t)
278 (setq headers (buffer-substring (point-min) (point)))
280 (narrow-to-region (point-min) (point))
281 (setq cte (mail-fetch-field "content-transfer-encoding")))
283 (delete-region (point-min) (point))
285 (setq cte (intern (downcase cte)))
286 (mm-decode-content-transfer-encoding cte)))
287 (unless (pgg-sign-region (point-min) (point-max) t)
288 (pop-to-buffer pgg-errors-buffer)
289 (error "Encrypt error"))
290 (delete-region (point-min) (point-max))
291 (mm-with-unibyte-current-buffer
292 (insert-buffer-substring pgg-output-buffer)
293 (goto-char (point-min))
294 (while (re-search-forward "\r+$" nil t)
295 (replace-match "" t t))
297 (mm-encode-content-transfer-encoding cte))
298 (goto-char (point-min))
304 (defun mml1991-pgg-encrypt (cont &optional sign)
305 (goto-char (point-min))
306 (when (re-search-forward "^$" nil t)
307 (let ((cte (save-restriction
308 (narrow-to-region (point-min) (point))
309 (mail-fetch-field "content-transfer-encoding"))))
310 ;; Strip MIME headers since it will be ASCII armoured.
312 (delete-region (point-min) (point))
314 (mm-decode-content-transfer-encoding (intern (downcase cte))))))
315 (unless (let ((pgg-text-mode t))
317 (point-min) (point-max)
320 (message-options-get 'message-recipients)
321 (message-options-set 'message-recipients
322 (read-string "Recipients: ")))
325 (pop-to-buffer pgg-errors-buffer)
326 (error "Encrypt error"))
327 (delete-region (point-min) (point-max))
329 (insert-buffer-substring pgg-output-buffer)
334 (defvar epg-user-id-alist)
335 (defvar password-cache-expiry)
338 (autoload 'epg-make-context "epg")
339 (autoload 'epg-passphrase-callback-function "epg")
340 (autoload 'epa-select-keys "epa")
341 (autoload 'epg-list-keys "epg")
342 (autoload 'epg-context-set-armor "epg")
343 (autoload 'epg-context-set-textmode "epg")
344 (autoload 'epg-context-set-signers "epg")
345 (autoload 'epg-context-set-passphrase-callback "epg")
346 (autoload 'epg-sign-string "epg")
347 (autoload 'epg-encrypt-string "epg")
348 (autoload 'epg-configuration "epg-config")
349 (autoload 'epg-expand-group "epg-config"))
351 (defvar mml1991-epg-secret-key-id-list nil)
353 (defun mml1991-epg-passphrase-callback (context key-id ignore)